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Need help for Cel II 566 overclock

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random thoughts

New Member
Joined
Jul 7, 2001
I have a Tyan Trinity 400 with an Iwill Slotket II. I have been unable to O/C the Cel II 566 to 850. I've tried setting the Slotket jumpers for: FCPGA, FSB 100, vcore = 1.7v, 1.75v. Also, have tried with Slotket on AUTO, and in BIOS set FSB = 100. PC won't boot, and I have to rest CMOS each time to start over.

Any suggestions out there for Slotket, MB jumper, and BIOS settings?
 
Do you have any lower settings between 66 and 100 MHz? Possibly not on that mobo, I don't know for sure. Sounds like it could be heat problems. What are your load CPU and system temps? What cooling mods have you done, if any? What type of CPU cooler are you using? How about memory, what speed RAM?
 
My set up is:
CPU with Golden Orb, with silicon thermal paste
Muskin budget memory (PC 133, CL3, 128 MB).

I do not believe this is a thermal issue. If thermal, then the CPU should operate until temp. rises over critical limit (whatever that is).

In my case, PC won't boot. So, I'm guessing not a thermal problem.

Rather, the motherboard won't recognize the CPU at those settings (100 FSB, mult. @ 8.5). I've seen people post in the database the same configuration. I just need to find out the settings.

As for other FSBs, I can use 75 and 83 by adjusting BIOS. 83 is very unstable and prone to lockups.

Thanks for any info.
 
Well, often the highest temps a CPU sees are at initial startup of a cold boot. That's why people use the SoftFSB program, so they can boot at a lower speed and then raise the speed after startup while in Windows. On the other hand, I had a C-566 with a Golden Orb that worked fine at 850 using 1.65v. However, not all chips will overclock equally. There are exceptional chips and there are overclocking dogs. Being unstable at 83 MHz is a possible warning sign. Maybe one of your PCI cards don't like being ran that far out of spec...or the CPU won't go any higher due to cooling or being maxed out. The Gorb coolers are far from the best, but maybe if you lap it and try using Arctic Silver thermal paste, it'll work better. I did this with my old C-566 system and got it to run several degrees cooler. Maybe too much of the thermal paste got squished off when installing the Gorb. I would first try removing the cooler, cleaning it up, and reapplying your thermal paste. Silicon based paste needs to be applied in a real thin, but even layer. If that don't work, here is couple other things to try. Go back to 83 FSB, but pull all the cards out except the video card (with the power off of course). If you're stable, then it was a card. If it's still not stable, then leave the case off and point a AC fan at the computer innards. If you achieve stability, you now know it's heat related. You never did tell us your CPU load temps, that would really tell us a lot.
 
I extremely do not recommend that you raise your vcore to 1.9 until you get rid of that orb. Orbs are good for defualt, but no overclocking purposes. Either they crack your core/extreme heat.
 
Need help for Cel II 566 overclock - temps

Sorry, no info on temps. The Tyan Trinity 400 has no temp. sensors.

Aside from suggestions re: cooling, any suggestions on Slotket jumper/BIOS/MB jumper settings??
 
After I went to the trouble of typing out a long list of suggestions to try, you just ignored all of it, didn't you? Why are you ignoring the cooling? That is absolutely critical to overclocking and you must have that under control prior to proceeding any farther. Oh well, I tried. Good luck anyway.
 
Batboy - don't feel unappreciated. I plan to use your suggestions. However, in case cooling is not the issue, then I'd like to get input of the other factors.

Since you are able to overclock the Cel II 566, care to share with me (and others) what settings you are using?
 
Well what do you mean what settings?

There aren't that many factors with the settings.

Vcore, FSB, and sometimes Vio.

Most boards automatically set AGP and PCI speeds.

As long as your not using pc66 ram than that shouldn't be a factor either.

Heat probably is the issue, especially if your not using thermal paste, it makes such a big difference. Cooling really is the most important thing.

Good luck!
 
I'm going with batboy on this one.......the fundamentals of overclocking is cooling first. Take it a step at a time, but take the first step first. Get the cooling.........the rest doesn't even matter at this point.

Moved post to Intel Motherboards
 
I just reread what I wrote in my last post. Wow, sounds like I'm a grumpy old man or a mad father lecturing his kid or something. Didn't mean for it to sound as bad as that. On the other hand, it does sort of bother me when we try to help the less experienced (and I'm assuming younger) overclockers who seem to want instant gratification and try to take shortcuts in overclocking. Hehehe, of course, 25 years ago I reckon I was the same way. Anyway, try going back to the basics and the first basic thing is cooling. There is a couple things to check in your BIOS also, such as RAM timing. RAM settings of 3, 3, 3, 7/9 are the most stable. The lower setting will give a little better performance, but sometimes at the sacrifice of stability. Overclocking is a fine art, not a science. What will work on one system might not work on another. The very first thing I'd do is figure out someway to monitor your temp, because until you do, you're just guessing. Either that or just trust and believe us old farts that have been doing this overclocking stuff for a while. Anyway, I truly mean it when I say good luck, because when it all boils down, there is a certain amount of luck involved in overclocking.
 
Although it will run Windows my 566 will not remain stable at 850 with my current setup, it runs solid at 783 though. I have an Abit BP6 with a Neo S370 adapter from Powerleap running the RU bios and my voltage will not go over 1.7v with this chip so i had to settle for 92 Mhz FSB (1/3 PCI divider...thank you Abit for this at least) with a bit of extra air-cooling. I have a rectangular hole milled in the top of my case with 2 60mm fans blowing down across the heatsink/board as well as 2 60mm exit fans at the botom. An old 486 fan on my vid. card and a bigger fan on my heatsink. Hopefully with a new heatsink i can reach 850 (all i have is a cooler master now) but i reccomend either a bigger/badder heatsink and extra cooling.....both relatively cheap fast and easy solutions.
 
I had the same problem.

What I suspect is that the problem is the jumper settings on your IWill Slocket2. They are some what confusing.

For example the numbering starting at the top is not jumper 1 but rather jumper 6. You can look at the circuit board on the slocket beside the jumper to see what number it is.

I made the mistake of assuming that the jumper number started at 1 for the top jumper in so doing fried my processor. Which was a Cel2 566.

I am happy to report that after learning my lesson I purchased a new processor and set my jumpers correctly and am now running great.

Caution**** jumper 8 needs to be set for FCPGA setting, if you set it for PPGA you will most likely blow your processor.

I am running mine overclocked to 850 rock solid. Stock fan running cool.

100 FSB
auto voltage
8.5 multiplier.
Soyo 6BA+IV motherboard.
PC133 ram

Depending on your motherboard you may or may not have to increase your voltage a bit to get it stable.

Also make sure that your motherboard supports Cel2-566

Hope that helps.
 
Do you have a jumper for multiplier setting or is it autodetected? The Multiplier for the C2 566 is 8.5.

You also could try a little higher voltage. My C2 runs at 896 but it takes 1.95 to do it.

Watch the heat, tho. I have an Alpha on mine....
 
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